The Audi TTS is already one seriously fast car, considering that it only has a 2-liter turbocharged engine. However, German tuner ABT has something for those who want more: 370 PS, or enough to mess with Porsche drivers. A series of changes brought to the TFSI engine have resulted in a power increase of 60 PS. Not only that, but torque is increased by 80 Nm (59 lb-ft) to 460 Nm. The tuners won't say how muc...[...]